312047249 has 4 divisors (see below), whose sum is σ = 312213300. Its totient is φ = 311881200.

The previous prime is 312047231. The next prime is 312047287. The reversal of 312047249 is 942740213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97219600 + 214827649 = 9860^2 + 14657^2 .

It is a cyclic number.

It is not a de Polignac number, because 312047249 - 2⁸ = 312046993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312047149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80174 + ... + 83975.

It is an arithmetic number, because the mean of its divisors is an integer number (78053325).

Almost surely, 2^312047249 is an apocalyptic number.

It is an amenable number.

312047249 is a deficient number, since it is larger than the sum of its proper divisors (166051).

312047249 is a wasteful number, since it uses less digits than its factorization.

312047249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166050.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 312047249 is about 17664.8591559627. The cubic root of 312047249 is about 678.2765243425.

The spelling of 312047249 in words is "three hundred twelve million, forty-seven thousand, two hundred forty-nine".